158 lines
5.2 KiB
Java
158 lines
5.2 KiB
Java
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/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http.cookie;
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import static io.netty.util.internal.ObjectUtil.checkNotNull;
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import java.util.Collections;
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import java.util.Set;
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import java.util.TreeSet;
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/**
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* A <a href="http://tools.ietf.org/html/rfc6265">RFC6265</a> compliant cookie decoder to be used server side.
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*
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* Only name and value fields are expected, so old fields are not populated (path, domain, etc).
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*
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* Old <a href="http://tools.ietf.org/html/rfc2965">RFC2965</a> cookies are still supported,
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* old fields will simply be ignored.
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*
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* @see ServerCookieEncoder
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*/
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public final class ServerCookieDecoder extends CookieDecoder {
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private static final String RFC2965_VERSION = "$Version";
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private static final String RFC2965_PATH = "$" + CookieHeaderNames.PATH;
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private static final String RFC2965_DOMAIN = "$" + CookieHeaderNames.DOMAIN;
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private static final String RFC2965_PORT = "$Port";
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/**
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* Strict encoder that validates that name and value chars are in the valid scope
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* defined in RFC6265
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*/
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public static final ServerCookieDecoder STRICT = new ServerCookieDecoder(true);
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/**
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* Lax instance that doesn't validate name and value
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*/
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public static final ServerCookieDecoder LAX = new ServerCookieDecoder(false);
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private ServerCookieDecoder(boolean strict) {
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super(strict);
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}
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/**
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* Decodes the specified Set-Cookie HTTP header value into a {@link Cookie}.
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*
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* @return the decoded {@link Cookie}
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*/
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public Set<Cookie> decode(String header) {
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final int headerLen = checkNotNull(header, "header").length();
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if (headerLen == 0) {
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return Collections.emptySet();
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}
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Set<Cookie> cookies = new TreeSet<Cookie>();
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int i = 0;
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boolean rfc2965Style = false;
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if (header.regionMatches(true, 0, RFC2965_VERSION, 0, RFC2965_VERSION.length())) {
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// RFC 2965 style cookie, move to after version value
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i = header.indexOf(';') + 1;
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rfc2965Style = true;
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}
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loop: for (;;) {
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// Skip spaces and separators.
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for (;;) {
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if (i == headerLen) {
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break loop;
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}
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char c = header.charAt(i);
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if (c == '\t' || c == '\n' || c == 0x0b || c == '\f'
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|| c == '\r' || c == ' ' || c == ',' || c == ';') {
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i++;
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continue;
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}
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break;
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}
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int nameBegin = i;
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int nameEnd = i;
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int valueBegin = -1;
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int valueEnd = -1;
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if (i != headerLen) {
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keyValLoop: for (;;) {
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char curChar = header.charAt(i);
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if (curChar == ';') {
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// NAME; (no value till ';')
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nameEnd = i;
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valueBegin = valueEnd = -1;
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break keyValLoop;
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} else if (curChar == '=') {
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// NAME=VALUE
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nameEnd = i;
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i++;
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if (i == headerLen) {
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// NAME= (empty value, i.e. nothing after '=')
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valueBegin = valueEnd = 0;
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break keyValLoop;
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}
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valueBegin = i;
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// NAME=VALUE;
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int semiPos = header.indexOf(';', i);
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valueEnd = i = semiPos > 0 ? semiPos : headerLen;
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break keyValLoop;
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} else {
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i++;
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}
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if (i == headerLen) {
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// NAME (no value till the end of string)
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nameEnd = headerLen;
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valueBegin = valueEnd = -1;
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break;
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}
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}
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}
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if (rfc2965Style && (header.regionMatches(nameBegin, RFC2965_PATH, 0, RFC2965_PATH.length()) ||
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header.regionMatches(nameBegin, RFC2965_DOMAIN, 0, RFC2965_DOMAIN.length()) ||
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header.regionMatches(nameBegin, RFC2965_PORT, 0, RFC2965_PORT.length()))) {
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// skip obsolete RFC2965 fields
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continue;
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}
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DefaultCookie cookie = initCookie(header, nameBegin, nameEnd, valueBegin, valueEnd);
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if (cookie != null) {
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cookies.add(cookie);
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}
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}
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return cookies;
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}
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}
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